Inelastic effect of electron–phonon interactions in tunnelling magnetoresistance of a single metallofullerene

Abstract

The effects of elastic and inelastic electron-phonon interactions on current-voltage characteristic and tunnelling magnetoresistance (TMR) of Li@C 59 X (X = N, B) molecule that is coupled to two ferromagnetic electrodes was investigated using the non-equilibrium Green's function (NEGF) method. Our results by taking also into consideration spin degrees of freedom (excluding spin-mixing effects) indicate that the presence of inelastic electron-phonon interaction polaron formation increases current and shifts the TMR behaviour to higher values. Also, an increase of two orders of magnitude observed in current for Li@C 59 B compared to C 60 .